I'm a late comer to your website.
When I bought my copy at Frye's they had about 15 copies of the Jewelcase version and about 10 copies of the boxed version.
I looked at both and bought the Jewelcase version.

I'm not sure what they have now. I'll have to check back in here next time I visit the store.
I've seen the screen saver around and about over the last year or so. I first saw the Plus Pack for XP that a buddy of mine was running. He mentioned having to purchase fish. I never persued it.
It wasn't until I purchased and downloaded a copy for a VP in my office, then I truly had a chance to really look at it. Very Nice!!
A few years back I was the IS Manager for Forte Software, and we made a screen saver product that was called 3DPC. It was kinda fun and it beat out Afterdark for a Windows Mag. Product of the year award. This Serene Screen Aquarium you put together is Awesome!!!

It's very clean and probably the best looking, realistic screensaver that I've seen.